JPH10326645A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector which allows sensing of incomplete fit condition of a retainer certainly even on the male connector side in the same manner as with a female connector. SOLUTION: A projection 15 as a sensing part is provided at the forefront of a female connector housing 10. When a male retainer 36 is installed in its connector housing 30 in a provisional engagement position, a female connector contacting projection 55 is positioned in the middle of a fit sensing groove 50 in communication with the inside of a hood 31. If therefore the retainer 36 is not fitted completely in the connector housing 30, the projection 15 contacts with the female connector contacting projection 55, so that the two connector members do not admit the fitting trial till the regular specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector of the type which uses a retainer to double-lock terminal fittings.

[0002]

2. Description of the Related Art FIGS. 30 and 31 show a state before conventional male and female connectors 250 and 254 are fitted. The female connector 250 on the left side of the figure includes a female housing 251 for housing the female terminal fitting 253, and a pair of upper and lower retainers 252.
Consists of The retainer 252 is for double-locking the female terminal fitting 253, and when the retainer 252 is completely assembled to the female housing 251 after the female terminal fitting 253 is primarily locked by the lance 258, the engagement is established. The protrusion 252A is assembled to the female terminal fitting 253, and the female terminal fitting 253 is secondarily locked in a retaining state.

On the other hand, a retainer 257 for double locking the male terminal fitting 255 is also provided on the male connector 254 side. Further, a hood portion 259 which is formed one size larger than the rear side and protects the male terminal fitting 255 is provided on the front side. Therefore, if the retainer 25 is
7 is not inserted to the normal depth, the retainer 257 is in a state of being raised from the surface of the male housing 256. Although it is possible to detect the half-fitted state of the retainer 257 for the time being based on this floating state, it is not possible to deny the possibility of being overlooked due to visual judgment. However, in the case of the female connector 250, when the connectors 250 and 254 are fitted together, the retainer 252 interferes with the opening edge of the hood portion 259, so that further fitting cannot be performed. As a result, half-fitting of the retainer 252 is reliably detected.

[0004]

However, in the case of the male connector 254, even if the retainer 257 is half-fitted,
No more than visual detection is possible. For this reason, conventionally, the male connector 254 side and the female connector 250 side are in a state where the detection of the half-fitting of the retainer is out of balance. The present invention has been made in view of the above circumstances,
The problem is to provide a connector that detects half-insertion of terminal fittings from the rise of the retainer of the male connector in accordance with the fitting operation of the male and female connectors.
It is an object of the present invention to provide a female connector which can prevent the retainer on the male connector from coming off.

[0005]

According to a first aspect of the present invention, there is provided a connector having a hood for accommodating a terminal fitting and accommodating a mating connector, and a connector accommodating chamber in the hood. A connector housing having a retainer mounting hole that communicates with the connector housing, and a retainer that is assembled to the retainer mounting hole and is locked to the terminal fitting to prevent it from falling out. , A temporary locking position allowing the insertion and removal of the terminal fitting,
An insertion position deeper than the temporary engagement position and a final engagement position that engages with the terminal fitting to prevent removal thereof are set, and an engagement that can be contacted from the connector storage chamber side in the final engagement position. The main connector is provided with a final locking holding portion that locks the retainer at the final locking position by locking to the locking portion.

According to a second aspect of the present invention, there is provided a connector housing having a hood for accommodating a terminal fitting and accommodating a mating connector, and a retainer for engaging and retaining the terminal fitting. Wherein at least one of the opposing surfaces of the mating connector and the retainer has the retainer in a half-fitted state when the mating connector enters the hood portion. In some cases, a detection unit is formed which interferes with each other to restrict fitting of the mating connector to a regular position.

According to a third aspect of the present invention, in the second aspect, the retainer is provided with a temporary locking position for allowing a terminal fitting housed in the connector housing to be inserted and removed, and the temporary locking. The insertion position is deeper than the insertion position, and the final engagement position is set to engage with the terminal fitting to prevent removal, and the retainer can interfere with the mating connector at the temporary engagement position, and the retainer A retainer guiding portion is formed in the detecting portion so that when the mating connector is fitted, the retainer is guided to the full locking position when between the temporary locking position and the full locking position. It is characterized by.

According to a fourth aspect of the present invention, there is provided the lock arm according to any one of the first to third aspects, wherein the mating connector is elastically engaged with the connector to hold both connectors in a fitted state. On the other hand, the connector is provided with a return spring which is compressed by the lock arm and urges the mating connector in the separating direction while the mating connector is being fitted to the mating connector.

According to a fifth aspect of the present invention, the retainer guiding portion is a full locking holding portion for holding the retainer at a full locking position. I do.

[0010]

According to the first aspect of the present invention, when the two connectors are fitted, the retainer is held at the final locking position by the final locking holding portion of the mating connector. For this reason,
On the connector side, a member for holding the retainer at the final locking position is not required, and the configuration is simplified.

According to the second aspect of the present invention, when the retainer is mounted to a proper position with respect to the connector having the hood portion, the retainer can be engaged with the terminal fitting housed therein to hold the connector in a retaining state. . However, when the retainer is in a half-fitted state where the retainer is not inserted to the position, when the mating connector is fitted into the hood portion, the detection unit interferes and the mating connector cannot be fitted to the regular position. Would. Thus, the operator can reliably detect the half-fit of the retainer.

According to the third aspect of the present invention, the connector is carried into the connection site of the connectors while the retainer is held at the temporary locking position. Therefore, even if the retainer attempts to fit the mating connector without any operation for engaging the terminal fitting, the fitting of the mating connector is regulated by the interference of the detection unit. However, when the retainer does not reach the normal position, but is operated from the temporary locking position, the guiding portion formed near the detecting portion guides the retainer to the normal position. The terminal fitting is corrected so that the terminal fitting is securely removed.

According to the fourth aspect of the present invention, as described above, when the connector does not reach the proper position due to a half-fit of the retainer or the like, the lock arm compresses the return spring. Therefore, the mating connector is pushed out by the spring force, whereby the operator can more reliably detect the half-fitting.

According to the fifth aspect of the present invention, the retainer guiding portion also functions as a full locking holding portion for holding the retainer at the full locking position. For this reason, it is not necessary to separately provide a configuration for holding the retainer at the final locking position on the connector side.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a male connector M1 and a mating female connector F1.
Can be fitted to each other. Hereinafter, the female connector F1 on the mating side will be described first for convenience of description, and then the male connector M1 will be described. In the description of the present embodiment, the surface on which the male and female connectors M1 and F1 are fitted is referred to as a front side.

As shown in FIGS. 7 and 8, the female connector F1 has a substantially rectangular parallelepiped connector housing made of a synthetic resin material (hereinafter referred to as a female housing 10).
A female terminal fitting 20 is provided therein. In the female housing 10, three cavities 11 are juxtaposed in the lateral direction (vertical direction in FIG. 7) (FIG. 12).
And 13), into which a female terminal fitting 20 is assembled from a terminal assembly opening 11A formed on the rear surface. A terminal insertion port 11B is provided on the front surface of each cavity 11.
When the male and female connectors F1 and M1 are fitted, a male terminal fitting 40 described later is inserted into its terminal insertion port 11B.
And is connected to the female terminal fitting 20. A retaining projection 12 is formed in each cavity 11 and engages with a lance 23 formed on the female terminal fitting 20 to temporarily lock the female terminal fitting 20.

On the lower surface of the female housing 10, a retainer mounting hole 10A is formed in a recess, and a retainer 13 is formed therein.
Can be installed. Retainer 13 is female terminal fitting 2
In a state prior to assembling the female housing 10, the female terminal 10 is held at a temporary locking position that slightly protrudes from the lower surface of the female housing 10. After assembling the female terminal fitting 20 into the cavity 11, when the retainer 13 is pushed into the female housing 10, the upper end of the retainer 13 engages with the female terminal fitting 20 to perform secondary locking. With the retainer 13 in the temporary locking position, the female connector F1 is connected to the hood 3 of the male connector M1.
1, the retainer 13 and the hood 3
1 is in contact with the lower end surface. Therefore, it can be seen that the female housing 10 on the female side and the retainer 13 are not completely fitted. Female housing 1
On the lower surface of 0, two slide projections 14 are provided to project rearward from the front end portion. Further, a pair of left and right detection protrusions 15 is provided at a lower portion of the front end surface of the female housing 10.
Are protruded horizontally. As shown in FIGS. 8 to 11 and the like, the upper side of the tip portion of the detection protrusion 15 is cut off diagonally to form a pressing surface 15A.

Also, as shown in FIG.
A lock arm 16 is formed on the upper surface of the lock arm 16 in a cantilever manner and can be flexibly deformed. A spring pressing portion 16A protrudes from the upper surface of the lock arm 16. At a position slightly forward of the position where the spring pressing portion 16A protrudes, a pair of fitting holding protrusions 17 project outward on both sides. The lower surface portion of the fitting holding projection 17 is a gentle guide surface 17A, and the rear end portion is substantially vertically cut.

The female terminal fitting 20 is formed by bending a conductive metal plate. The female terminal fitting 20 is connected to the barrel section 21 to which the terminal of the electric wire C is connected, and the contact section 2 for fitting into the male terminal fitting 40 to make contact therewith.
And 2. The barrel portion 21 includes the female terminal fitting 20.
And a pair of insulation barrel pieces that are formed at the rear end of the wire C to crimp the coated end of the electric wire C and a pair of wire barrel pieces that are swaged to project the core wire portion that is exposed from the coated end. Become. The contact portion 22 includes a pair of elastic contact pieces disposed to face each other, and a protective cylinder that covers the elastic contact pieces, so that the tab 42 of the male terminal fitting 40 is press-fitted between the elastic contact pieces. ing. A lance 23 that engages with the retaining projection 12 to prevent the female terminal fitting 20 from coming off is formed in the protective cylinder by cutting and raising.

Next, as shown in FIG. 1, the male connector M1 comprises a male housing 30 formed of a synthetic resin material in a substantially rectangular parallelepiped shape, and a male terminal fitting 40 housed therein.
And a retainer 36 for secondary locking the male terminal fitting 40. At the front of the male housing 30, a female connector F
1 is formed therein, and a connector housing chamber 31A for housing the female housing 10 on the female side is formed therein.
And an arm storage chamber 31B for storing the lock arm 16
And a spring accommodating chamber 31C for accommodating the return spring 37.

The connector housing chamber 31A is formed at a lower portion in the hood portion 31, and the arm housing chamber 31B is formed above the connector housing chamber 31A corresponding to the position of the lock arm 16 of the female connector F1. Have been. The spring storage chamber 31C is formed above the arm storage chamber 31B. Behind the connector accommodating chamber 31A, three cavities 33 are juxtaposed in the horizontal direction (the direction orthogonal to the paper surface in FIG. 4), and the terminal assembly formed on the rear surface (right side in FIG. 4) is provided there. The male terminal fitting 40 is assembled with the tab 42 protruding into the connector accommodating chamber 31A from the opening 33A. A protrusion 34 is provided from the lower side of the center of each cavity 33 so as to protrude.
The male terminal fitting 40 is primarily locked by engaging with the lance 43 formed at 0. A terminal protruding hole 33B communicating with the connector accommodating chamber 31A is formed at the front end of the cavity 33, so that the tab 42 of the male terminal fitting 40 can protrude. The lower wall surface of the connector housing chamber 31A is provided with two slide grooves 56, in which the slide protrusions 14 of the female female housing 10 are slidably mounted.

Further, a pair of fitting pieces 32 project from the left and right wall surfaces toward the inside near the opening edge in the arm storage chamber 31B. A guide surface 32A is formed on the upper surface side of the fitting piece 32 from the front to the rear. When the female and male connectors F1 and M1 are fitted, the fitting holding protrusion 17 provided on the female lock arm 16 is formed. The lock arm 16 is guided so as to bend and deform upward while contacting the guide surface 17A (see FIG. 13).

The spring accommodating chamber 31C is formed to open in front and rear of the male housing 30, and a return spring 37 described below is mounted inside the male housing 30 so as to be elastically deformable in the longitudinal direction of the male housing 30. A spring engagement wall 38 projects from both sides of the front end portion of the spring storage chamber 31C, and a space between the engagement walls 38 is larger than the spring pressing portion 16A of the lock arm 16. A spring stopper 39 is provided on the lower end surface of the spring storage chamber 31C so as to project rearward from a position separated by a predetermined length from a rear end position of the fitting piece 32. The spring stopper piece 39 is formed so as to be elastically deformable downward, and a stopper claw 39A for retaining the return spring 37 is protrudingly provided at a tip portion thereof. The length from the spring engagement wall 38 to the retaining claw 39A is substantially the same as or slightly shorter than the length of the return spring 37.

The return spring 37 is formed by bending a plate-like metal plate having a width slightly smaller than that of the spring accommodating chamber 31C into a corrugated cross section, and is pushed into the room from the rear side of the spring accommodating chamber 31C. When the return spring 37 is mounted in the spring accommodating chamber 31C, its front end is engaged with the spring engaging wall 38, and its rear end is engaged with the retaining claw 39A. Is done. Male and female connectors F1, M
When the fitting operation 1 is performed, the lock arm 16 is bent upward and deformed by the contact action of the guide surfaces 17A and 32A formed on the fitting holding projection 17 and the fitting piece 32, respectively. For this reason, the spring pressing portion 16 </ b> A is
C from the front side and presses the tip of the return spring 37,
This is deformed in a direction to shrink. When the male and female connectors F1 and M1 reach the regular fitting positions, the fitting holding projections 1
The lock arm 16 returns downward and deforms and is located in the arm storage chamber 31B because the 7 gets over the fitting piece 32. Then, there is no contact between the spring pressing portion 16A and the return spring 37, and the return spring 37 is also returned to its original length.

Further, a short terminal 60 for detecting a fitting is attached to the back of the arm storage chamber 31B. The short terminal 60 is formed by folding back into a U-shaped cross section, and is assembled in a state where the folded portion is disposed on the back side. The lower end of the short terminal 60 is bifurcated into both left and right sides (the direction perpendicular to the plane of FIG. 4), and each of the branch pieces 60A is curved in a mountain shape. Then, in the assembled state, the two branch pieces 60A come into contact with the distal ends of the two male terminal fittings 40 located on the right side in front view among the male terminal fittings 40 protruding into the connector accommodating chamber 31A. (Not shown in detail). As a result, the two male terminal fittings 40 are always in a conductive state before the female connector F1 is fitted into the hood portion 31, and when the female connector F1 is completely fitted into the hood portion 31, the female connector F1 is completely closed. Each branch portion 60A is pushed down by the female housing 10 of F1, and the two male terminal fittings 40 become non-conductive.

Next, on the lower surface side of the male housing 30, a retainer mounting hole 35 is formed substantially at an intermediate position of the cavity 33, and a retainer 36 can be mounted therein. The retainer mounting hole 35 is cut out in a strip shape across the left and right sides of the lower surface of the male housing 30 and communicates with each cavity 33. Both end portions of the retainer mounting hole 35 are formed as fitting detection grooves 50 communicating with the connector housing chamber 31A. A pair of retainer locking grooves 51 are provided at positions sandwiching the central cavity 33. Locking projections 51A and 51B for locking the retainer at different levels are provided on the front and rear walls of the male housing 30 before and after forming the retainer locking groove 51. this house,
The temporary locking projection 51B located on the rear side is provided at a position shallower than the main locking projection 51A formed on the front side.

The retainer 36 is formed of a synthetic resin material, and is engaged with the male housing 30 at two positions, a temporary locking position where the male housing 30 is shallowly engaged and a full locking position where the male housing 30 is locked deeper. Has been enabled. Of these, at the temporary locking position, the retainer 36 does not enter the inside of the cavity 33, so that the male terminal fitting 40 can be inserted and removed. At the final locking position, the tip of the retainer 36 enters the cavity 33 and The male terminal fitting 40 is used to secondarily lock the fitting 40.
Is in a withdrawn state. The retainer 36 is shown in FIGS.
As shown in FIG. 5, a flat base 52 and three types of protrusions 53, 54, 55 projecting upward from the base 52 are provided.

Of these, the terminal engaging projection 53 is provided so as to correspond to the cavity 33 of the male housing 30.
The male terminal fitting 40 can be engaged with the retainer engaging portion 44. Further, a pair of retainer locking projections 54 provided so as to sandwich the terminal engagement projection 53 located at the center,
The projection is higher than the terminal engagement projection 53, and holds the retainer 36 and the male housing 30 at the two locking positions described above. The distal ends of the retainer locking projections 54 are bifurcated and can be elastically deformed in the closing direction.
B. Of the two locking legs, the temporary locking leg 54B on the rear side engages with the temporary locking projection 51B of the retainer locking groove 51 to hold the retainer 36 in the temporary locking position, and is on the front side. The final locking leg 54A engages with the final locking projection 51A to bring the retainer 36 into the final locking position (see FIGS. 5A and 5B).

Further, a pair of female connector contact protrusions 55 are provided on both ends of the retainer 36 so as to protrude therefrom. The tip portion is directed forward, and the lower surface portion is slanted to form a guide surface 55A. When the retainer 36 is assembled to the male housing 30, the female connector contact projection 55 is located in the retainer locking groove 51.

The male terminal fitting 40 includes a barrel portion 41 to which the terminal of the electric wire C is connected, and a tab 4 that contacts the female terminal fitting 20.
And 2. The barrel portion 41 includes a male terminal fitting 40.
A pair of insulation barrel pieces formed at the rear end of the wire, which are not labeled, but caulk the coated end of the electric wire C, and a pair of wires which caulk a core part which is exposed from the coated end and protrudes. Consists of barrel pieces. A protection tube (not shown) is fitted in the tab 42, and a lance 43 for preventing the male terminal fitting 40 from coming off is formed in the protection tube. A retainer engaging portion 44 for engaging the terminal engaging protrusion 53 of the retainer 36 is formed in the rear of the lance 43.

Next, the operation and effect of this embodiment will be described. First, the male housing 30 and the retainer 36 are assembled at the temporary locking position, and the male terminal fitting 40 is inserted into the cavity 33 from the terminal assembly opening 33A. Lance 43
The male terminal fitting 40 is temporarily locked when it gets over the retaining projection 34 and returns to its original shape. At this time, the tab 42 has entered the connector housing chamber 31A and is in contact with the branch portion 60A of the short terminal 60. Then, the retainer 36 is pushed toward the male housing 30 to be in the final locking position.

Next, when the female connector F1 is fitted into the hood portion 31 of the male connector M1, the fitting holding projection 17 of the lock arm 16 is moved by the fitting operation, so that the arm housing chamber 31B
Guide surface 1 formed on both members in contact with fitting piece 32 inside
7A and 32A are in contact. Therefore, the lock arm 16 is elastically deformed upward. At this time, the spring pressing portion 16A above the lock arm 16 enters the spring accommodating chamber 31C and deforms the return spring 37 by bending. Further, when the fitting operation of the male and female connectors F1 and M1 proceeds and the fitting holding projection 17 gets over the fitting piece 32, the lock arm 1
6 is returned and deformed, and the rear ends of the fitting holding projection 17 and the fitting piece 32 abut against each other, so that both connectors are held in a retaining state, and the return spring 37 passes above the spring pressing portion 16A. To return to the original state. In the meantime, the female housing 10 on the female side is located below the male housing 30.
The pair of detection projections 15 projecting from the groove enter the engagement detection groove 50 and are located below the female connector contact projection 55 of the retainer 36 at the final locking position (see FIG. 9). reference). However, when the male / female connectors F1 and M1 are not sufficiently fitted at the time of this fitting operation and the operation is completed, the return spring 37 is pressed by the spring pressing portion 16A. Lock arm 16 by power
, The female connector F1 is discharged outward from the hood portion 31. Therefore, a state in which the male and female connectors F1 and M1 are incompletely fitted to each other is avoided.

In the above description, the retainer 36 and the male housing 3
The case where 0 has reached the regular final locking position has been described. However, at the actual connector assembly site, the male and female connectors F are not necessarily assembled with the retainer 36 and the male housing 30 to the final locking position.
There is a case where the fitting operation of M1 is performed. next,
Such a case will be described. When the retainer 36 is in the provisionally locked position with respect to the retainer mounting hole 35, the female connector contact protrusion 55 is located at an intermediate portion of the fitting detection groove 50 (see FIG. 10). In this state, when the male and female connectors F1 and M1 are fitted together, the detection protrusion 15 and the female connector contact protrusion 55 come into contact with each other, so that both connectors cannot be fitted to the proper positions. For this reason, the operator will notice that the retainer 36 and the male housing 30 have not reached the final locking position.

When the retainer 36 and the male housing 30 have been pushed from the temporary locking position to the full locking position, but have not reached the full locking position, the female connector contact projection 55 is , Are located slightly above the temporary locking position. In such a case, the male and female connectors F1,
When the detection protrusion 15 reaches the position of the female connector contact protrusion 55 with the fitting operation of M1, the slopes formed on both members (the push-up surface 15A and the guide surface 55A) come into contact with each other.
Therefore, when the female connector F1 is further pushed into the male connector M1, the pushing surface 15A pushes up the retainer 36 via the guide surface 55A in the direction of the final locking position. Then, when the male and female connectors F1 and M1 reach the regular fitting positions, the retainer 36 is pushed up to the final locking position (see FIG. 11).

As described above, the present embodiment has the following effects. When the retainer 36 and the male housing 30 are at the temporary locking position, the female connector F1
If the female connector F1 is fitted in the connector 1, the detection protrusion 15 and the female connector contact protrusion 55 interfere with each other, so that the female connector F1 cannot be fitted to the regular position. Thus, the operator can reliably detect the half-fit of the retainer 36. Further, when the retainer 36 does not reach the normal position, but is operated from the temporary locking position, the pressing action between the pushing surface 15A of the detection projection 15 and the guide surface 55A of the female connector contact projection 55 is performed. To guide the retainer 36 to the normal position by the
6 is corrected to a proper mounting state, and the male terminal fitting 40 is reliably prevented from coming off. Further, when the fitting of the female connector F1 does not reach the proper position due to a half-fitting of the retainer 36 or the like, the lock arm 16 is moved to the return spring 3 position.
Since the female connector F1 is compressed, the female connector F1 is pushed out by the spring force, whereby the worker can more reliably detect the half-fitting.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS.
In this embodiment, a female connector F2 and a male connector M2 that are fitted to each other are provided. In the description of the present embodiment, the end faces of the connectors F2 and M2 that are fitted to each other are referred to as front sides.

First, the female connector F2 will be described. As shown in FIGS. 16 and 17, the female connector F2 has a female housing 101 formed of a synthetic resin material in a block shape. Three cavities 102 are formed in the female housing 101 in a horizontal row, and a female terminal fitting 104 connected to the terminal of the electric wire 103 is inserted into each cavity 102 from the rear. A locking step 106 is formed in the cavity 102, and the lance 105 of the female terminal fitting 104 is locked to the locking step 106, whereby the female terminal fitting 104 is moved into the cavity 102.
Is primarily locked in. A retainer mounting hole 108 is formed in the lower surface of the female housing 101 so that a retainer 110 can be mounted therein. Retainer 110
The female terminal fitting 104 is secondarily locked in the cavity 102 by forming an engaging projection 111 with the jaw 104 </ b> A of the female terminal fitting 104. Further, the retainer 110 includes a temporary locking leg 112 and a full locking leg 113. When the retainer 110 is attached to the female housing 101, first, the retainer 110 is held at the temporary locking position by the engagement between the temporary locking legs 112 and an engaging portion (not shown) on the female housing 101 side. At this time, since the engaging projection 111 is retracted to the lower surface side of the cavity 102, the insertion and removal of the female terminal fitting 104 are allowed as described above. Next, after the female terminal fitting 104 is inserted, when the retainer 110 is pushed in, the final locking leg 113 engages with an engaging portion (not shown) on the female housing 101 side to reach the final locking position. At this time,
The engaging protrusion 111 protrudes into the cavity 102 and fits on the rear surface of the jaw portion 104A of the female terminal fitting 104, so that the female terminal fitting 104 is double-locked.

Here, when the retainer 110 is held at the temporary locking position, a part of the retainer 110 protrudes from the lower surface of the female housing 101. For this reason, when the female connector F2 is fitted into the hood portion 123 of the male housing 121 described later in this state, the retainer 110 abuts against the tip of the hood portion 123,
Further fitting is restricted, and it can be easily detected that the retainer 110 is in the half-inserted state. Further, on the upper surface of the female housing 101, a cantilever-shaped deformable lock arm 115 is formed so as to be folded from the front end side to the rear end side. A pressing portion 116 projects from the upper surface of the lock arm 115, and a pair of lock projections 117 project from both side edges slightly forward of the pressing portion 116.

Next, the male connector M2 will be described.
The male connector M2 has a male housing 121 formed of a synthetic resin material. A cavity 124 capable of accommodating the male terminal fitting 126 is formed on the rear side of the male housing 121 (the rear side of the male housing 121 is hereinafter referred to as a “main body 122”). This body 1
On the front side of 22, a hood portion 123 into which the female housing 101 can be fitted is provided. Three cavities 124 are formed in the main body 122 in a horizontal row, and a male terminal fitting 126 connected to the terminal of the electric wire 125 is inserted into each of the cavities 124 from behind.
The male terminal fitting 126 is provided with a lance 127,
The male terminal fitting 126 is primarily locked by locking the lance 127 to the locking step 128 formed in the cavity 124. At this time, the tab 129 of the male terminal fitting 126 projects into the hood portion 123. The male housing 121 is provided with a retainer 141 for double locking the male terminal fitting 126.
The structure of the retainer 141 and its mounting portion will be described later.

The inside of the hood portion 123, from the center to the lower portion, is a connector accommodating chamber 130, in which the female connector F2 is accommodated. Further, a spring housing chamber 131 opened to the front is provided at an upper portion in the hood portion 123. A pressed member 132 is provided in the spring storage chamber 131 so as to be slidable in the front-rear direction. The pressed member 132 is pushed by the pressing portion 116 of the lock arm 115 during the fitting operation of the connectors F2 and M2. On the rear surface side of the pressed member 132, two return springs 133 made of a compression coil spring are provided. The pressed member 132 is always provided with a pair of return springs 1.
33, the spring housing chamber 131 is urged forward.
Is locked by a retaining portion 134 protruding from the ceiling surface of the vehicle. The front end portion of the bottom surface of the spring storage chamber 131 is open, and walls 135 are formed on both side edges so as to hang down. A locking projection 136 is formed on the inner surface of the wall 135. During the fitting operation of the two connectors F2 and M2, the lock projection 117 climbs over the locking projection 136 while climbing over it. When the fitting of the two connectors F2 and M2 is completed, the lock projection 117 becomes the locking projection 136.
And both connectors F2 and M2 are locked.

The cavity 124 in the main body 122
The short terminal 138 is assembled in the upper space. The short terminal 138 is formed by folding a conductive metal plate into a U-shaped cross section, and has an upper surface portion fixed and assembled with the folded portion facing the back. The lower surface side of the short terminal 138 is branched into three corresponding to the number of the male terminal fittings 126 to be accommodated, and a contact portion 140 bent downward in a mountain shape is formed at the tip of each branch piece 139. ing. And this short terminal 13
8 are assembled, the contact portions 140 of the respective branch pieces 139 are in contact with the tabs 129 protruding into the hood 123 of the male terminal fitting 126, respectively.
26 are electrically connected. This prevents a potential difference between the male terminal fittings 126 from occurring. on the other hand,
When both connectors F2 and M2 are fitted, each branch piece 139
Is elastically pushed up by the female housing 101 and separated from the tab 129, so that the respective male terminal fittings 126 are in a non-conductive state (see FIG. 24).

Further, as shown in FIG.
A retainer mounting hole 142 is formed on the lower surface side of the, and a retainer 141 is mounted here. As shown in FIG. 18, the retainer 141 is provided with three engagement protrusions 144 on the upper surface of the substrate 143, which can be engaged with the rear surface of the jaw portion 126 </ b> A of the male terminal fitting 126. Two sets of retainer locking projections 147 are formed between the engagement projections 144. The tip of the retainer locking projection 147 is bifurcated, and the temporary locking leg 148 and the full locking leg 149 are elastically deformable in the closing direction.
Are formed.

On the other hand, the male housing 121 has a pair of retainer locking grooves 15 on both sides of the center cavity 124.
0 is formed, and a temporary locking receiving portion 151 is provided at a front edge of the retainer locking groove 150. Further, a final locking receiving portion 152 is provided at a rear edge of the retainer locking groove 150 at a position deeper than the temporary locking receiving portion 151 (see FIGS. 19 and 20). Then, as shown in FIG. 20A, the temporary locking leg 148 is locked to the temporary locking receiving portion 151, so that the retainer 141 is held at the temporary locking position.
At this temporary locking position, the above-mentioned engaging protrusion 144 is retracted to the lower surface side of the cavity 124, so that the male terminal fitting 1
26 can be inserted and removed into cavity 124. Next, as shown in FIG.
Is further pushed into the main locking leg 149 and the main locking receiving portion 1.
When the retainer 141 is locked, the retainer 141 is held at the full locking position. In this full locking position, the engagement protrusion 144 protrudes into the cavity 124 and can be engaged with the jaw 126A of the male terminal fitting 126.

A pair of retaining pieces 154 are provided on both left and right ends of the retainer 141. At the front side of the retaining piece 154, a cut is made from the center to the lower side, and the upper end side is shaped to protrude forward, and the protruding portion is a contact projection 156. On the other hand, on the female housing 121 side, the retainer mounting hole 1
As shown in FIG.
4 is formed with a retaining piece insertion groove 158 that allows the insertion of the retaining piece 4. The front side of the retaining piece insertion groove 158 is provided along the inside of the side wall of the hood portion 123 and communicates with the connector accommodating chamber 130.

On the left and right sides of the front end of the mating female housing 101, the contact protrusions 1 of the male retainer 141 are provided.
A lock groove 161 that can be fitted is formed in the groove 56. The locking groove 161 is provided at a position where the contact protrusion 156 can be fitted when the retainer 141 is at the final locking position. The detection section 109 extends from the locking groove 161 to the bottom surface of the female housing 101. When the retainer 141 is in a half-inserted state with respect to the male housing 121, the contact protrusion 156 and the detection section 109 are provided. And come into contact with each other.

Next, the operation and effect of the present embodiment configured as described above will be described. First, as shown by the arrow in FIG.
When the retainer 141 is inserted into 42, the temporary locking leg 148 is locked by the temporary locking receiving portion 151, as shown in FIG. 20A, so that the retainer 141 is held at the temporary locking position. At this time, the retaining piece 154 is inserted into the retaining piece insertion groove 15.
Inserted into 8. In this temporary locking position, the engagement protrusion 14
4 retreats to the lower surface side of the cavity 124. When the male terminal fitting 126 is inserted into the cavity 124 in this state, the male terminal fitting 126 is primarily locked by the lance 127. At this time, the tab 129 of the male terminal fitting 126 projects into the hood portion 123 and the short terminal 138.
Respectively contact with the corresponding branch pieces 139. continue,
When the retainer 141 is further pushed in, as shown in FIG. 20 (B), the final locking leg 149 is locked to the final locking receiving portion 152, and the retainer 141 is held at the final locking position. Accordingly, as shown in FIG. 17, the engagement protrusion 144 protrudes into the cavity 124 and is locked behind the jaw portion 126A of the male terminal fitting 126, whereby the male terminal fitting 12
6 is secondarily locked.

On the other hand, on the female connector F2 side, the female terminal fitting 104 is inserted into the cavity 102 and the retainer 11
Stopped by 0. Next, the female connector F2 is fitted into the hood portion 123 of the male connector M2. During this fitting operation, as shown in FIG.
Lock projection 117 rides on the locking projection 136, and the lock arm 115 is elastically deformed upward. At this time, the pressing portion 116 presses the pressed member 132 while resisting the elasticity of the return spring 133. In this fitting operation,
When the retainer 141 of the male connector M2 is in the final locking position, as shown in FIG. 25, the positions of the contact protrusions 156 and the locking grooves 161 of the female housing 101 correspond to each other, and the contact protrusions 156 Is continued while entering into the locking groove 161.

When the connectors F2 and M2 are properly fitted, the lock projection 117 gets over the locking projection 136, and the lock arm 115 is returned and deformed as shown in FIG. Then, the lock projection 11 of the lock arm 115
7 is locked to the rear surface of the locking projection 136, and both connectors F2,
M2 is locked in the proper fitting state. The pressed member 132 is returned to the front position by the restoring elasticity of the return spring 133. At this time, the contact protrusion 156 of the retaining piece 154
The locking groove 1 of the female housing 101 as shown in FIG.
61, so that the retainer 141
Is locked at the final locking position by the mating female connector F2.

If the operation is interrupted before the two connectors F2 and M2 are properly fitted during the fitting operation of the two connectors F2 and M2, as shown in FIG. The arm 115 receives a force in the return direction, the female connector F2 is ejected outward, and both connectors F2, M
2 is prevented from being left in a half-fitted state.

During the above-mentioned fitting operation, when the retainer 141 and the male housing 121 are not at the proper final locking position (for example, when the user has forgotten to push the retainer 141 into the final locking position, Since the terminal fitting 126 is in the half-inserted state, even if the pushing operation is performed, the engaging projection 144
(For example, when the retainer 141 is held at the temporary locking position due to the fact that the retainer 141 cannot be pushed in by hitting the main body of the male terminal fitting 126), the state when the two connectors F2 and M2 are fitted with each other will be described.

When the retainer 141 is at the temporary locking position, as shown in FIG. 28, the retaining piece 154 provided on the retainer 141 is not inserted into the retaining piece insertion groove 158. Therefore, the contact protrusion 156 is located at the detection unit 109 of the female housing 101 of the other party. For this reason, near the end of the fitting operation of the connectors F2 and M2, the detecting unit 109 and the contact protruding portion 156 abut, and further fitting operation is impossible. If the fitting operation cannot be performed to the proper position, the female connector F2 is ejected by the elastic force of the return spring 133 if the fitting operation is interrupted, so that the female connector F2 can be clearly recognized.
The fact that the connectors F2 and M2 cannot be properly fitted in this manner allows the operator to detect that the retainer 141 is not mounted at the final locking position. When the half-insertion of the retainer 141 is detected, the retainer 141 is pushed into the final locking position while confirming the inserted state of the male terminal fitting 126, and then the two connectors F2 and M2 may be fitted again.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIG. The difference between the present embodiment and the second embodiment is mainly the position of the locking groove 183 provided in the female connector F3. For this reason, only the relevant portion is shown, and the description of the remaining configuration is omitted. The locking grooves 183 are provided as a pair at lower positions on both left and right sides on the front end surface of the female connector F3. The locking groove 183 is provided on both side walls 18 of the female connector F3.
It is located slightly inside from 4.
For this reason, compared with the locking groove 161 of the second embodiment, the side wall surfaces 184A on both side edges are added. Even when the female connector F3 and the male connector (not shown) configured as described above are fitted, the same operation and effect as in the second embodiment can be achieved. Further, in the present embodiment, when the abutment projection (both not shown) of the retainer attached to the male connector is inserted into the locking groove 183, there is the side wall surface 184A, so that the female connector F3 The engagement force with the male side retainer is enhanced. For this reason, the retainer is more difficult to come off.

[Other Embodiments] The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. Besides, within the technical scope,
Various modifications can be made. In this embodiment,
Although the case where the retainer is mounted from the side surface of the housing, that is, the direction orthogonal to the fitting direction has been described, the invention is also applicable to the case where the retainer is mounted from the front or the rear of the housing. The present invention can be applied to a female connector depending on the shape.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a first embodiment before a retainer is mounted on a male housing.

FIG. 2 is a front view of a male housing.

FIG. 3 is a rear view of the male housing.

FIG. 4 is a side sectional view when the male housing and the retainer are at a temporary locking position.

FIG. 5 is a side cross-sectional view showing a locking portion when the retainer is at a temporary locking position or a full locking position with the housing.

FIG. 6 is a front view of the female housing.

FIG. 7 is a bottom view of the female housing.

FIG. 8 is a side sectional view of the female housing.

FIG. 9 is a side cross-sectional view showing a state near a fitting detection groove when the male and female connectors are properly fitted when the male housing and the retainer are at the final locking position.

FIG. 10 is a side cross-sectional view showing a state near a fitting detection groove when the male and female connectors are fitted when the male housing and the retainer are at a temporary locking position.

FIG. 11 is a side cross-sectional view showing a state near a fitting detection groove when the male and female connectors are fitted when the male housing and the retainer are at an intermediate position from the temporary locking position to the final locking position;

FIG. 12 is a side sectional view when the male and female connectors are properly fitted.

FIG. 13 is a cross-sectional side view showing a state where the male and female connectors are fitted together in a state where the male housing and the retainer are not fitted in their proper positions.

FIG. 14 is a side view of the male retainer.

FIG. 15 is a rear view of the male side retainer.

FIG. 16 is an exploded perspective view of the second embodiment.

FIG. 17 is a vertical cross-sectional view of a state before fitting of both connectors.

FIG. 18 is a perspective view of a retainer.

FIG. 19 is an exploded perspective view of the male connector viewed from the back side.

FIG. 20 is a sectional view showing the locking operation of the retainer.

FIG. 21 is a partially cutaway side view of a state before both connectors are fitted.

FIG. 22 is a cross-sectional view of the male connector in a state where the retainer is in a temporary locking position.

FIG. 23 is a front view of the male connector.

FIG. 24 is a longitudinal sectional view showing a state where both connectors are in the process of being fitted;

FIG. 25 is a longitudinal sectional view showing a portion of a detection piece of the retainer.

FIG. 26 is a longitudinal sectional view showing a state where both connectors are properly fitted;

FIG. 27 is a longitudinal sectional view showing a portion of a detection piece of the retainer.

FIG. 28 is a longitudinal sectional view showing a state where half-insertion of a retainer is detected.

FIG. 29 is a front view of a female connector according to the third embodiment.

FIG. 30 is an exploded perspective view showing a part of the conventional example.

FIG. 31 is a longitudinal sectional view showing the retaining operation of the retainer.

[Explanation of symbols]

 Reference numeral 15: detection protrusion (main locking holding portion, detection portion) 15A: pressing surface (retainer guiding portion) 16, 115: lock arm 30, 121: male housing (connector housing) 31, 123: hood portion 31A, 130 ... Connector accommodating chambers 35, 142 Retainer mounting holes 36, 141 Retainers 37, 133 Return springs 40, 126 Male terminal fittings (terminal fittings) 50 Fitting detection grooves (retainer mounting holes) 55 Female connector contact projections 55A: Guide surface (retainer guide) 109: Detector 156: Contact projection (locker, detector) 161: Lock groove (final lock holder) F1, F2, F3: female connector (mating connector) M1, M2: male connector (connector)

Claims (5)

[Claims] 1. A connector housing having a hood capable of accommodating a terminal fitting and accommodating a mating connector and a retainer mounting hole communicating with a connector accommodating chamber in the hood, and being assembled to the retainer mounting hole. A connector provided with a retainer for engaging and retaining the terminal fitting so as to prevent the terminal fitting from being removed. A deep insertion position and a final locking position for engaging with the terminal fitting to prevent removal are provided, and a locking portion that can be contacted from the connector housing chamber side at the final locking position is provided. The mating connector is provided with a full locking holding portion that locks the retainer at the full locking position by being locked to the locking portion. 2. A connector comprising: a connector housing capable of accommodating a terminal fitting and having a hood for accommodating a mating connector; and a retainer for engaging with the terminal fitting to prevent the terminal fitting from coming off. The at least one of the opposing surfaces of the mating connector and the retainer may interfere with each other when the mating connector is in a half-fitted state when the mating connector enters the hood portion, A connector having a detection unit for restricting fitting of the mating connector to a regular position. 3. The retainer has a provisional locking position for allowing a terminal fitting housed in the connector housing to be inserted and removed, and an insertion position deeper than the provisional locking position, wherein the retainer engages with the terminal fitting and comes off. When the retainer is capable of interfering with the mating connector at the temporary locking position and the retainer is between the temporary locking position and the full locking position, As the retainer is guided to the final locking position as the mating connector is fitted,
3. The connector according to claim 2, wherein a retainer guide is formed in the detector. 4. The mating connector includes a lock arm that elastically engages with the connector to hold both connectors in a fitted state, while the connector is in the process of mating with the mating connector. The connector according to claim 1, further comprising a return spring that is compressed by the lock arm and urges the mating connector in a separating direction. 5. The connector according to claim 2, wherein the retainer guiding portion serves as a full locking holding portion that holds the retainer at a full locking position.